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[Qemu-devel] [PATCH 06/24] target-arm: A64: Implement store-exclusive fo
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 06/24] target-arm: A64: Implement store-exclusive for system mode |
Date: |
Tue, 21 Jan 2014 20:12:12 +0000 |
System mode store-exclusive use a different code path to usermode ones;
implement this missing code, in a similar way to the 32 bit version.
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/translate-a64.c | 68 ++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 62 insertions(+), 6 deletions(-)
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index e0f6765..5aa1f17 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -1422,12 +1422,68 @@ static void gen_store_exclusive(DisasContext *s, int
rd, int rt, int rt2,
}
#else
static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
- TCGv_i64 addr, int size, int is_pair)
-{
- qemu_log_mask(LOG_UNIMP,
- "%s:%d: system mode store_exclusive unsupported "
- "at pc=%016" PRIx64 "\n",
- __FILE__, __LINE__, s->pc - 4);
+ TCGv_i64 inaddr, int size, int is_pair)
+{
+ /* if (env->exclusive_addr == addr && env->exclusive_val == [addr]
+ * && (!is_pair || env->exclusive_high == [addr + datasize])) {
+ * [addr] = {Rt};
+ * if (is_pair) {
+ * [addr + datasize] = {Rt2};
+ * }
+ * {Rd} = 0;
+ * } else {
+ * {Rd} = 1;
+ * }
+ * env->exclusive_addr = -1;
+ */
+ int fail_label = gen_new_label();
+ int done_label = gen_new_label();
+ TCGv_i64 addr = tcg_temp_local_new_i64();
+ TCGv_i64 tmp;
+
+ /* Copy input into a local temp so it is not trashed when the
+ * basic block ends at the branch insn.
+ */
+ tcg_gen_mov_i64(addr, inaddr);
+ tcg_gen_brcond_i64(TCG_COND_NE, addr, cpu_exclusive_addr, fail_label);
+
+ tmp = tcg_temp_new_i64();
+ tcg_gen_qemu_ld_i64(tmp, addr, get_mem_index(s), MO_TE + size);
+ tcg_gen_brcond_i64(TCG_COND_NE, tmp, cpu_exclusive_val, fail_label);
+ tcg_temp_free_i64(tmp);
+
+ if (is_pair) {
+ TCGv_i64 addrhi = tcg_temp_new_i64();
+ TCGv_i64 tmphi = tcg_temp_new_i64();
+
+ tcg_gen_addi_i64(addrhi, addr, 1 << size);
+ tcg_gen_qemu_ld_i64(tmphi, addrhi, get_mem_index(s), MO_TE + size);
+ tcg_gen_brcond_i64(TCG_COND_NE, tmp, cpu_exclusive_high, fail_label);
+
+ tcg_temp_free_i64(tmphi);
+ tcg_temp_free_i64(addrhi);
+ }
+
+ /* We seem to still have the exclusive monitor, so do the store */
+ tcg_gen_qemu_st_i64(cpu_reg(s, rt), addr, get_mem_index(s), MO_TE + size);
+ if (is_pair) {
+ TCGv_i64 addrhi = tcg_temp_new_i64();
+
+ tcg_gen_addi_i64(addrhi, addr, 1 << size);
+ tcg_gen_qemu_st_i64(cpu_reg(s, rt2), addrhi,
+ get_mem_index(s), MO_TE + size);
+ tcg_temp_free_i64(addrhi);
+ }
+
+ tcg_temp_free_i64(addr);
+
+ tcg_gen_movi_i64(cpu_reg(s, rd), 0);
+ tcg_gen_br(done_label);
+ gen_set_label(fail_label);
+ tcg_gen_movi_i64(cpu_reg(s, rd), 1);
+ gen_set_label(done_label);
+ tcg_gen_movi_i64(cpu_exclusive_addr, -1);
+
}
#endif
--
1.8.5
- [Qemu-devel] [PATCH 00/24] target-arm: implement some AArch64 system registers, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 18/24] target-arm: Implement AArch64 VBAR_EL1, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 11/24] target-arm: Implement AArch64 DAIF system register, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 16/24] target-arm: Implement AArch64 SCTLR_EL1, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 10/24] target-arm: Implement AArch64 MIDR_EL1, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 06/24] target-arm: A64: Implement store-exclusive for system mode,
Peter Maydell <=
- [Qemu-devel] [PATCH 03/24] target-arm: Restrict check_ap() use of S and R bits to v6 and earlier, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 12/24] target-arm: Implement AArch64 cache invalidate/clean ops, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 09/24] target-arm: Implement AArch64 CurrentEL sysreg, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 23/24] target-arm: Implement AArch64 dummy breakpoint and watchpoint registers, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 22/24] target-arm: Implement AArch64 ID and feature registers, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 02/24] target-arm: Define names for SCTLR bits, Peter Maydell, 2014/01/21
- [Qemu-devel] [PATCH 08/24] target-arm: A64: Implement MSR (immediate) instructions, Peter Maydell, 2014/01/21